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qaws [65]
3 years ago
14

I need help question 13

Chemistry
1 answer:
kondor19780726 [428]3 years ago
4 0
The answer will be B
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The heat of combustion of butane , c4h10 , is 2874 kj/mol. what is the heat of combustion of butane, in kj per gram?(provide the
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The daily dose for aspirin recommended by doctors is 81 mg/ day to reduce heart disease. a) In a week how many milligrams are ad
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a)567mg

b)0.567 grams

Explanation:

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Both a siren passing by and radar exhibit the Doppler effect. What is the main
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Answer:

D. Radar uses radio, and the siren uses sound waves.

Explanation:

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3 years ago
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Balance chemical equation hbr(aq)+o2(g) h20(l)+br2(l)
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3 years ago
How many moles of Ba(NO3)2 are there in 0.25 L of a 2.00 M Ba(NO3)2 solution?
klemol [59]

Answer:

0.5moles

Explanation:

Given parameters:

Volume of solution= 0.25L

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Number of moles  = ?

Solution:

To solve this problem;

  Molarity is the number of moles of solute in a given volume of solution, so

 Number of moles  = molarity x volume

 Now insert the parameters and solve;

  Number of moles  = 0.25 x 2  = 0.5moles

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2 years ago
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